loop-skills AGENTS.md

loop-skills AGENTS.md is an instructions file for Codex, OpenCode from donnfelker/loop-skills. It costs 1,257 tokens per session, scanned A, original, MIT.

Repository instructions for a collection of agent skills packaged as a Claude Code plugin marketplace.

In plain words
What is it for?
Use them when creating, packaging, or maintaining skills and plugins in the loop-skills repository.
Why use it?
They explain the required folder structure, metadata, workflow principles, and development checks.

Instructions file for CodexOpenCode

Installs and runs on its own, but its text points at files inside the plugin that ships it — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/donnfelker/loop-skills/agents-md
Clone the repo
git clone --depth 1 https://github.com/donnfelker/loop-skills

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for loop-skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/donnfelker/loop-skills/agents-md.svg)](https://agentmods.dev/instructions/donnfelker/loop-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/donnfelker/loop-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/donnfelker/loop-skills/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,257 This file is loaded in full into every session.
When invoked 1,257 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.01257 $0.01257
Opus 5 $0.00629 $0.00629
Sonnet 5 $0.00251 $0.00251
Haiku 4.5 $0.00126 $0.00126

Measured 4d ago against content hash 4e54b0118d75, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

loop-skills AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidelines for AI agents working in this repository.

Repository Overview

This repository contains Agent Skills following the Agent Skills specification, packaged as a Claude Code plugin marketplace via .claude-plugin/marketplace.json.

Every plugin here is a bounded autonomous loop: it drives an artifact to a terminal state, checks an explicit termination condition (quiet round, two clean passes, a cap), and commits per round for an audit trail.

Repository Structure

plugins/
└── plugin-name/
    ├── .claude-plugin/
    │   └── plugin.json        # Plugin manifest (name, description, version, license)
    ├── references/            # Optional - plugin-wide docs cited via ${CLAUDE_PLUGIN_ROOT}/references/...
    └── skills/
        └── skill-name/
            ├── SKILL.md       # Required skill file (<500 lines)
            ├── references/    # Optional - skill-local docs loaded on demand
            ├── scripts/       # Optional - executable code
            └── assets/        # Optional - templates, data files

Build / Lint / Test Commands

Skills are content-only (no build step). Validate with:

./validate-skills.sh plugins/*/skills/

Manually verify: YAML frontmatter is valid; name matches the directory exactly; name is 1-64 chars, lowercase alphanumeric and hyphens; description is 1-1024 characters.

Required Frontmatter

---
name: skill-name
description: What this skill does and when to use it. Include trigger phrases.
---
Field Required Constraints
name Yes 1-64 chars, lowercase a-z, numbers, hyphens. Must match dir.
description Yes 1-1024 chars. Describe what it does and when to use it.
license No License name (default: MIT)
metadata No Key-value pairs (author, version, etc.)

Read the full file on GitHub · 98 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 98 lines · 1,257 tokens per session scan A 4e54b0118d75

Subscribe to this mod's changes

loop-skills AGENTS.md is an instructions file published in the GitHub repository donnfelker/loop-skills (18 stars, last pushed 1mo ago), licensed MIT. It adds 1,257 tokens to every session, about $0.0063 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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